3891585156 has 12 divisors (see below), whose sum is σ = 9080365392. Its totient is φ = 1297195048.

The previous prime is 3891585091. The next prime is 3891585157. The reversal of 3891585156 is 6515851983.

It is a happy number.

3891585156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3891585099 and 3891585108.

It is not an unprimeable number, because it can be changed into a prime (3891585157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162149370 + ... + 162149393.

It is an arithmetic number, because the mean of its divisors is an integer number (756697116).

Almost surely, 2^3891585156 is an apocalyptic number.

It is an amenable number.

3891585156 is an abundant number, since it is smaller than the sum of its proper divisors (5188780236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3891585156 is a wasteful number, since it uses less digits than its factorization.

3891585156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324298770 (or 324298768 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 51.

The square root of 3891585156 is about 62382.5709313106. The cubic root of 3891585156 is about 1572.9280093773.

The spelling of 3891585156 in words is "three billion, eight hundred ninety-one million, five hundred eighty-five thousand, one hundred fifty-six".